Practice Test Geeks(CTI) Certified Tile Installer Practice Test
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Surface Preparation & Adhesives Flashcards

9 cards from real CTI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 9 Surface Preparation & Adhesives flashcards as text

  1. Why is surface preparation critical before tile installation?

    Answer: To ensure a clean, level, and dry substrate

    Proper surface preparation ensures tile adhesion and prevents future tile failure.

  2. What is the purpose of a crack isolation membrane?

    Answer: To prevent cracks in the tile caused by substrate movement

    This membrane helps prevent cracks from the substrate from transferring to the tile surface.

  3. What is the most common adhesive used for tile installation?

    Answer: Thinset mortar

    Thinset mortar is widely used for its bonding strength and flexibility.

  4. Which substrate requires a primer before applying adhesive?

    Answer: Gypsum board

    Highly absorbent substrates like gypsum may require a primer to prevent premature drying of the adhesive.

  5. Why should dust be removed before adhesive application?

    Answer: It promotes strong adhesion between surface and tile

    Dust prevents adhesive from bonding properly to the substrate.

  6. Which trowel is best for applying thinset?

    Answer: Notched trowel

    A notched trowel is used to ensure even adhesive coverage on the tile and surface.

  7. What happens if adhesive is applied too thickly?

    Answer: It can cause tile leveling issues

    Excess adhesive can cause uneven tile placement and longer drying times.

  8. How long should adhesive cure before grouting?

    Answer: 24 hours

    Allowing thinset to cure for at least 24 hours prevents tile movement during grouting.

  9. Why use modified thinset mortar?

    Answer: It enhances performance and adhesion

    Modified thinset contains polymers that improve flexibility, bonding, and strength.

How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. ceramictilefoundation.org — Eligibility, test delivery, fees, exam format, passing score, retake policy, score release, test dates, time limit · verified Oct 2026